Weighing machine



Nov. 24, 1931. NAL 1,833,263

WEIGHING MACHINE File De 29. 1926 i 5 Sheets-Sheet 1 Nov. 24, 1931.

T. RIVAL WEIGHING MACHINE Filed Dec. 29, 1926 5 Sheets-Shee 2 Nov. 24,1931. I T. RIVAL 3 WEIGHING MACHINE Fil Dec- 29, 1926 5 Sheets-Shee 4mlawz jda/rm-cdr Nov". 24, 1931. RNAL 1,833,263

WEIGHING MACHINE Filed Dec. 29', 1925 5 Sheets-Sheet 5 Patented Nov. 24,1931 UNITEDSTATES PATEN OFFICE 'rnnoPHILn nIvAn, or ennivr, BELGIUMwnrenms MACHINE Application filed De cember 29, 1926, Serial No.157,778, and 'in Belgium December 29, 1925.

' This invention relates to certain new and useful improvements appliedon weighing machines, wherein the ZLClJlOIl'Of the load causes theweight scale to rise and to take up 53 suitably suspended weights untiltheload 1s tion with the weighing bridge'according to Figure 8 forthereading of the pO1S1Ilg "rebalanced, the accuracy of the poising resultbeing increased by the improvements for which I have filed in July 151925, anapplication No. 43,860.

Theinvention is illustrated in the accompanying drawings, in which rFigure 1 is a vertical section of the weighing machine according to lineAB of Figure 2..

Figure 2 is a plan view ofthe machine. Figure 3 is a vertical section online CD of Figure 1." i i Figures 3a to 7 are details showing variv ousarrangements ofthe weights suspended from the auxiliary weights carryingbalances;

Figure 8 shows a weighing bridge for '35 units.

Figure 9 shows the board used in connecsults. v v y Figures 10 to 12show respectively a lateral view, a plan view partly in section, and afront View of the modification.

applied to a balance with simple beamythe weights being removed in acompletelysymmetric way by the weight'scale.

. 85 is the simple beam balance, the equal or unequal arms of whichsupport the load scale 5 on one hand and the weight scale sup-, portingyoke 6 on the, other hand. Said weightscale is formed of two equalscales 3637 arranged symmetrically with relation to the suspension knifeedge 14 of the yoke 6.

In this application I use two auxiliary balances 88 which are equal andhave equal arms and suspended above the weight scale by means ofsupports secured to the frame and each supporting a. series of weightsIn Figures 1 to '3, the balancingldevice is may vary, without changingthe system, provided that thefdifference in height will be sufficientfor allowing free movement of the balances. The distances between theaxes of'sa'id supports in horizontal projection depends on the positionof the equal plates 36 and 37'(Figure 1). a

i The weights are each formed of two masses, each'having an'upperandlateral supporting. arm provided with a supporting point 34 and endinginto al'suspension hook 33 above the mass, the supporting points beingarranged on the vertical line running through the sus-, pension point 40(Figure 4) on the hook. 38' and at variable. distances apart. The twoportions forming each Weight areconnected in such a way that they'may beplaced respectively upon the yokes 38 symmetricall to the axis ofsuspension of the latter.' Q Of the two series of wei 'hts 42 and 43,the

weights '43 are those which, suspended from knifeedges 11',- 11 of theauxiliary balances,

haveno direct connectionwith the pendulous suspended at 1010 are.connected to the pendulousbalance (as described hereinafter).

All these weights are equal to one-half of the unit to be weighed exceptfor the weights balance Theweights42 are those which,

which are connected to the pendulous balance I I (or the multiplyingbalance as will be described) For said weights 42 the Weight will beequal to one-half of the unit minus the weight of one-half of the armandaccessories of their connection to the multiplying balance orpendulous balance, if there is no multiplying balance. The halves of theweights 42 are connected. together (Figure 5) by means of a small arm 44connecting. their supporting points and in the center ofwhich .a' smallknife edge 45 will'be placed. 7 The twoknife edges 45 are connectedby abar 46 carrying two small supports resting on the knife edges 45.

The plate 46 carries a lower hook 47 and an upper knife edge 48, theflat side of which is turned downwardly and parallel to the direction ofthe beam 35.

The supporting arms of the scale 36-37 carry (Figure 1) a central arm 49of adjustable length carrying a knife 50, the sharp edge of which isturned downwardly and at right angles to the beam 35.

A lever 15, arranged below the scale 36-37 and having its supports 16'secured to the frame, balances by itself the supports and connectinghooks of a pendulous balance 20. The lever is arranged below the scales36-37 in such a way that its knife 25 will be located in the verticalplane passing through the knife edge 14 of the main balance. Said lever15 with unequal arms serves merely to multiply the strokev of the scale36-37 for a weight of the value of one unit. The same is connected onone hand to the hook 47 of the connection 46 of the weights 42 and onthe other hand to a pendulous balance 20 (by means of knife edge 17,link 18 and knife edge 19).

The pendulous beam 20 is also arranged below the scale 36-37 and has itsbearings secured to the frame, said balance being arranged in such a waythat its knife edge 19 and the knife edge 17 of lever 15' will be in thesame vertical plane when starting.

' The system thus formed is so arranged that, at the starting of thebalance, the two weights 42 will be flush with the scale 36-37, the twoweights 43 then being at a distance 2 8 apart from the same scale andthe knife edge 50 of the scale 36-37 being flush with the knife 48 ofthe connection 44-45-46 of 4 the weights 42 a being the verticaldisplacesaid system working in the same manner as that described in myprior application.

The auxiliary balances 8, 8 may be arranged both in the same verticalplane as the beam 35 and at the same time in a common horizontal plane.In this case the distance between the supports may be determined atwill, but should be somewhat larger than the corresponding width of theplates 36-37 plus four times the distance between the vertical linespassing the one through the suspension point of the weights on the yokeand the other through the side part of the suspension arms of saidweights (see Figure 10).

The connection 44-45-46, instead of being attached to the weights, maybe attached by a similar arrangement to arms suspended at 1O, 10 fromthe balances 8-8 (Figure 7).

Figure 8 shows a weighing bridge for 35 weighing units formed of acombination of two weighing devices according to Figures 1 to 3.

The weighing bridge is formed of a balance beam 1, 2, 3 fulcrumed at 2on the frame and supporting at 1 the load plate (not shown) or connectedat 1 tothe connecting rod of a weighing bridge orthe like weighingmachine and at 3 the weights scale comprising two equal plates 8 and 9carried on the supporting branches 4, 5, 6, 7 in such a manner that saidplates are symmetrically disposed with respect to the knife edge 3 ofthe weight scale.

Above the weight scale are disposed two equal auxiliary balance beams10, 11, 12 and 13, 14, 15 suspended from supports fixed in the frame andcarrying each on their respective ends 10, 15 and 12, 13 a series ofWeights P and a series of wei hts Q symmetrically disposed on yokes.Said weights are formed and disposed as in the preceding devicesdescribed, each of said weights weighing one-half of the multiple to beread on the weight indicating board.

16, 17, 18 (Figure 8) show a multiplying lever or balance disposed inthe scale as above, fulcrumed on the frame at 18. This lever isconnected, as above, to the hook 19 of the weight connecting means,while at 16, instead of being connected directly to the pendulous lever,it carries a weight scale formed of two plates 20, 21 similar to thescale 8, 9 but of smaller size.

The lever 16, 17, 18 with its scale 20, 21 and supporting branches ofthe latter is balanced by a counterweight 22. Two further auxiliarybalances 23, 24, 25 and 26, 27, 28 are located above the weight scale20, 21 in a similar manner as the balances 10, 11, 12 and 13, 14, 15 aredisposed above the weight scale 8, 9. Said balances support respectivelyat their ends 23, 28 and 25, 26 a series of weights 7; or a series ofweights 9 symmetrically disposed on yokes. Said weights 7) and. g,constructed and disposed as above described, should each be able tobalance at 16 one-half of the weight unit.

The distance, between the supporting pins of the weights is obtained asin my previous devices, taking in account that:

a being the displacement, in vertical projection, of the weights scale,corresponding to the chosen multiple.

a the displacement, in vertical projection, of the weights scale of themultiplying bal ance at 16 for the unit.

8 a free movement chosen for the reading of the units.

-r the ratio of the arms of the multiplying balance for 5 units, itresults the following relation:

ocX-r=l(8'+a') +11 14 pendulous lever is provided, fulcrumed on theframe at 29 and connected at 30 to a hook 31 secured on V the connectingmember of'thejweights p, as previously. explained. The balance is,adjusted at the beginning of the weighingso that the weights areconveniently'disposed with .respect to each of the weight scales 8, 9and 20, 21.

fThe pullingaction of the load on the end Zof the-beam 1, 2, 3 raisesthe scale 8, 9 which, raising the weights Pa, raises at the same timethemultiplying lever which transmits. this raising motion to the weights mby the intermediary of the scale 20, 21. These weights gm beingconnected to the weights p which exert on the pendulous lever a pull,the limitofwhich attains the Weight unit I This pull being produced, thefirst the weights p (3m) are taken up by the scale 20, 21 and so on, Ifthe weights charge taken up by. the scale 20, 21 andthe pull of thependulous lever on the last of saidweights' have together attained the"value of the desired multiple, the two first weights P (you) will inturn betaken up by the scale 8, 9 and for a larger charge two weights Q,will move downward the multiplying lever which thus abandonssuccessively theweights p, 1, taken up by the scale 20,21 and so on forthe increasing charges, until the latter system has moved back to zero,a still larger charge causing a renewed pull and so on.

The main balance moves as in the before described devices of this class,that is, according to a periodical motion comprising two periods a 8, 0c8.

The multiplying balanceperforms an ascensional periodical motioncomprising two periods a 8, a 8, a 8', 0: until the limit of pulling ofthe chosen multiple is attained;

this upward motion being followed by a periodical downward motioncomprising two periods a 6, a 8, a 8, or for the following multiple andso on alternately.

Two weights disposed on each of the auxv1l1ary balances w1ll glve fiveunits.

Conveniently this number should not be passed for the units, the units0, 1,2, 3, 4 being indicated by the upward motion plus the number 1000indicated on the dial of the decimals and the units 5, 6, 7, 8, 9 by thedownward motion plus 1000 on the dial of the decimals.

Figure 8 shows the reading arrangement readily obtained by the motion ofthe weights.

The desired multiplying to be given to the .multiplying balance 16, 17,18 and the determination of the distances between the supporting pinsmay be obtained at will and con sists in having the multiples indicatedon a board having the open slots disposed alternately on either side ofa central space, the indications being made by a bicolored index 33movable at the back side of the board 32, whereby only one color isvisible at the time.

The board may be fixed on the frame or connected with the load scale,whereas the movable index is connected to the support of the scales 8, 9in a similar'manner as for the units in the previously describeddevices. The color of the index for the multiples is determinative forthe color of the units to be read. For'the'units, the indicating systemis the same, except that theindication being given alternately frombottom to top and from top (2) thecolor ofthe index being thesame; the

O' (at the right hand side of-the board (I) corresponds to the downwardmotion (right hand part) of the units board (2). The color of themultiple is determinative for the unit to be read, the latter beingalways on the same side as the decimals. V Concerning the decimals, asthey should be read alternately from the left to the right hand side andfrom the right to the left hand side, the numbersindicating the unitswillbe of the same color as that of the decimals,of course these twocolors should differ from the preceding ones or be of a different type,such as for instance shown in Figure 9. Having now fully described mysaid vinvention, what I claim, and desire to secure by Letters Patent,is:

1. A weighing machine comprising a frame, a single beam balancefulcrumed on said frame, a load receiving device connected and'having atits opposite end means connect ing ittothesaid pendulum balance, meansconnecting said lever at an intermediate point to said auxiliarybalances through said weights, and means for reading on aboard the unitsand on a dialthe fraction of unit of the weighing operation.

i 2; In a weighingmachine of the kind described, a frame, a single beambalance ful crumed on said frame, a load receiving device connected toone end of said single'beam, a weight scale suspended'from the oppositeend of said beam,'two auxiliary weights carrying single beam balancesfulcrumed on the frame,

just above the weights scale of the main bal ance, equaljarms'atieachend of the beams of said auxiliary balances, yokes suspended from saidarms, four series of weights freely and symmetrically suspended fromsaid yokes by their hooked stems, each weight corresponding to half themultiple of the unit to be read, supporting pins on each of said hookedstems, connections between two weights, one of each auxiliary balance, apendulum balance, a multiplying balance beam fulcrumed on said frame, aconnecting rod between said multiplying beam and the weights, a secondsmaller weights scale disposed at the free end of said multiplying beam,connecting means between said weight scale and said pendulum balance, acounterweight on the other end of said beam for balancing same togetherwith the smaller weight scale, two further auxiliary weights carryingbalances supported on the frame above the smaller weights scale, yokessuspended from each end of said balances, four series of weights freelyand symmetrically suspended by their hooks from said yokes, each weightcorresponding to half the full poise to be indicated by the pendulumbalance, and being suspended by their hooks above the weights scale instirrups in which they may be raised, connections between two weights,each of the latter on one of the auxiliary balances, and meanspermitting the reading in'units and multiples of the units on slottedboards and the fraction of the unit on dials fixed on the frame.

3. Ina weighing machine, means for permitting the reading in units andmultiples of the units on slotted boards and the fractions of the uniton dials, said means comprising two equal and equally numerated boards,a row of apertured grooves on each of said boards, connecting branchesbetween said boards and the rod transmitting the action of the load tothe main balance, said boards disposed so as to move respectively leftand right of the vertical line dividing in two portions the readingdevice, two differently colored rectangular indexes fixed on branchesconnected to the main weights scale and arranged respectively behindsaid boards, the left one above, the right one below the said verticalline,so as to be visible through one groove during the weighing of eachunit multiple and this alternately left and right for the successiveones, the free move of the main balance being permitted by thedisposition of the supporting pins of the weights, causing the change ofthe side and of the color, two further boards fixed. together on theframe, one on each side of the middle of the reading device, a row ofapertured grooves equally disposed, but not equally numerated, disposedon said further boards, the left being numerated from bottom to top, andthe right from top to bottom, numbers applied on said boards in twodifferent colors, one color for the zero and the even units, one otherfor the odd units, a bi-color index with on each consider on the unitsboard, a dial with two opposite graduations differently colored, thecolors of which correspond to those of the numbers of the units boards,a pendulous lever, a pointer secured on the pendulous lever moving infront of said dial from left to right and from right to left, to showthe decimals, the color of the unit number being determinative for thedecimals to be read.

In testimony whereof I have hereunto set my hand.

THEOPHILE RIVAL.

